/Engine/Source/Editor/MaterialEditor/Public/MaterialEditingLibrary.h
Create connection between two material expressions
static bool ConnectMaterialExpressions ( [UMaterialExpression](API\Runtime\Engine\Materials\UMaterialExpression) * FromExpression, [FString](API\Runtime\Core\Containers\FString) FromOutputName, [UMaterialExpression](API\Runtime\Engine\Materials\UMaterialExpression) * ToExpression, [FString](API\Runtime\Core\Containers\FString) ToInputName )